J Korean Acad Oral Health.  2017 Sep;41(3):201-207. 10.11149/jkaoh.2017.41.3.201.

Survival of individual teeth after non-surgical endodontic treatment

  • 1Department of Social and Humanity in Dentistry, Wonkwang University School of Dentistry, Iksan, Korea. shinhosung@gmail.com


The present study aimed to estimate the survival rate of teeth after non-surgical root canal treatment and to investigate the effect of income on the tooth survival rate.
The study included 1,414.668 endodontically treated teeth from 1,193.666 persons enrolled in the National Health Insurance Service in 2002. A survival analysis of the teeth was performed using the Kaplan-Meier method. The survival rates were calculated using a follow-up period of 11 years after the root canal treatment.
In the present study, the 11-year cumulative survival rate of teeth after non-surgical endodontic treatments was 86.90%. The survival rates of teeth tended to decrease for the posterior teeth; the maxillary teeth showed a lower survival rate than that of the mandibular teeth. The teeth with the highest survival rates were the mandibular left lateral incisor, maxillary right incisor, mandibular right lateral incisor, and maxillary left central incisor, in that order. The lowest survival rates were shown by the mandibular second molar, maxillary second molar, maxillary first molar, and mandibular first molar, in that order. The survival rate of the first molar (#16, #26, #36, #46) was higher in the low-income group than in the high-income group (P<0.001).
This study represents the outcome pattern of root canal treatment among South Korean individuals. These study findings can be used as comparative data for clinical decision making about endodontic treatment.


Cumulative survival rate; Kaplan-Meier Survival method; Non-surgical endodontic treatments; Tooth extraction
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